JP3498068B2 - Connection structure of reinforcing body and method of manufacturing connection member - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connecting structure of a reinforcing body, particularly a reinforcing body, which is used by being buried in soil to prevent a slope from collapsing and collapsing to form a stable slope. The present invention relates to a connecting member for connecting and a method for manufacturing the connecting member.

[0002]

2. Description of the Related Art For example, in the embankment method used when constructing a river embankment, or when laying a road or a railway, a soil retaining body is used to prevent a slope from collapsing and form a stable slope. It is provided. The earth retaining body is a plurality of approximately L
In the soil retaining wall that is formed along the slope where earth pressure acts, and the soil retaining wall that is bent from the bottom of the retaining retaining wall and is formed in a lattice shape by fixing the vertical vertical reinforcements to each other by multiple transverse reinforcements. It is configured in a substantially L shape by the embedded anchor portion. Such earth retaining bodies receive the earth pressure acting on the slopes by the earth retaining walls and lock the slopes, and the displacement of the earth retaining walls is blocked by the frictional resistance force that the anchor part receives from the surrounding earth and sand to prevent the slopes from collapsing. To prevent.

When preventing the slope from collapsing,
For example, depending on the height of the embankment and the local environment, large earth pressure may act on the slope. In this case,
In order to reliably receive this large earth pressure, it is necessary to increase the length of the anchor portion of the soil retaining body, that is, the anchor length. However, due to reasons such as transportation, the length of the anchor portion of the soil retaining body is limited, and therefore, the grid-shaped anchor body formed separately from the soil retaining body is fixed by bolts and nuts. The tool is used to connect to the anchor part of the soil retaining body to increase the overall anchor length.

FIG. 14 is a perspective view showing a connecting structure 1 for a resin net for civil engineering work disclosed in Japanese Utility Model Publication No. 6-29210. In the connection structure 1, the two resin nets 3 and 4 that are the reinforcing bodies are connected to each other using the elliptical spiral connection member 2 without using bolts and nuts. Specifically, one resin net 3
Of the resin nets 3 and 4 are aligned by aligning the mesh 3a of the resin nets 3 and 4 which are opened in the rectangular shape with the mesh 4a of the other resin net 4 which is opened to the rectangular shape, and one side of the polymer nets 3 and 4 is overlapped. The connecting member 2 through the meshes 3a, 4a, and the connecting rigid rod 5 through the connecting member 2 projecting to the other side of the overlapping portion of the resin nets 3, 4 by connecting the two resin nets 3, 4 To connect.

[0005]

In such a prior art, since the earth retaining body and the anchor body are connected by using the bolt and the nut, the connecting work requires a fine work. In particular, when constructing a river embankment as described above, or when laying a road or railroad, it is necessary to reinforce the slope over a wide area, which requires a lot of labor, which results in a long construction time. I will end up.

In the connection structure 1 for the resin net for civil engineering disclosed in Japanese Utility Model Publication No. 6-29210, the connection member 2 is used.
Since it has an elliptical spiral shape, it is not stable when placed on the ground, and when connecting the resin nets 3 and 4, it is necessary to fix the connecting member 2 so as not to roll, and only for fixing. Personnel and equipment are required, resulting in poor work efficiency.

Since the connecting member 2 has an elliptical spiral shape,
The connecting member 2 is the first in the longitudinal direction of the resin net 3 on one side.
The resin nets 3 and 4 are inserted through the resin nets 3 and 4 at an angle with respect to the direction C1. When they try to separate from each other, not only the bending force but also the pulling force in the axial direction of the wire rod of the connecting member 2 and the twisting force around the axis act on the connecting member 2. The connecting member 2 made of a wire is very vulnerable to such a combined force, and in order to withstand such a force, the outer diameter of the wire must be increased, and the outside of the wire must be made larger. When the diameter is increased, the connecting member 2 becomes larger, and the sizes of the meshes 3a and 4a of the resin nets 3 and 4 must be increased according to the connecting member 2.

Further, the connecting member 2 has meshes 3a, 4a in a state in which the wire rods extend along a diagonal line of the meshes 3a, 4a opened in a rectangular shape.
Therefore, it is necessary to increase the size of the meshes 3a and 4a in the second direction C2, which is the direction perpendicular to the first direction C1 (sometimes referred to as the "direction through which the connecting rigid rod 5 is inserted"), to some extent. Therefore, for example, the second of the meshes 3a and 4a
When the dimension in the direction C2 is approximately the same as the outer diameter of the wire rod of the connecting member 2, the connecting member 2 is attached to the resin net 3,
Can not be inserted into 4.

Further, since the connecting member 2 has a spiral elliptical shape,
In the state where the dimension of the connecting member 2 in the second direction C1 is larger than the outer diameter of the connecting rigid rod 5 inserted into the connecting member 2 and the connecting rigid rod 5 is inserted into the connecting member 2,
Since the connecting rigid rod 5 is displaced in the first direction C1, the resin nets 3 and 4 cannot be stably connected. Further, a force in the first direction C1 acts on one of the resin nets 3,
When the resin nets 3 and 4 try to separate from each other along the first direction C1, the connecting member 2 is compressed in the first direction C1 and a direction perpendicular to the first direction C1 and the second direction C2. That is, the resin nets 3 and 4 are deformed so as to extend in the overlapping direction C3, and the connecting rigid rod 5 inserted into the connecting member 2 can be displaced in the overlapping direction C3, so that the connecting rigid rod 5 is separated from the connecting member 2. If the resin nets 3 and 4 come out, the stable connection of the resin nets 3 and 4 cannot be maintained.

Therefore, an object of the present invention is to provide a connecting structure which can be easily connected to a reinforcing member which is buried in soil and used to reinforce a slope, and a method for manufacturing the connecting member. Is.

[0011]

The present invention according to claim 1 is formed in a lattice shape by a vertical member extending along a direction in which earth pressure acts and a horizontal member which is fixed to intersect the vertical member. A first reinforcing body connected to the earth retaining wall that receives the earth pressure and embedded in the soil, a vertical member extending along the direction in which the earth pressure acts, and a horizontal member that is fixed to intersect the vertical member. Is formed in a grid shape by the first in the direction in which the earth pressure acts.
A second reinforcement body partially overlapped with the reinforcement body and embedded in the soil, and a bottom portion formed in a substantially U shape extending in the direction in which the earth pressure acts, and spaced apart in the extending direction of the transverse member. A connecting member that has a plurality of locking parts provided and a connecting part that connects the locking parts on the open end side, and is provided by inserting the locking parts into the first and second reinforcing bodies. A connecting member formed into a substantially S-shape when projected on an imaginary plane parallel to a direction in which the vertical member extends and a direction in which the horizontal member extends, and a locking member inserted into each locking portion of the connecting member. It is the connecting structure of the reinforcing body characterized by including.

According to the present invention, the first reinforcing member formed in a lattice shape by the vertical member and the horizontal member is, for example, on the earth retaining wall which locks the slope of the embankment and receives the earth pressure acting on the slope. , Directly or indirectly connected and buried in the soil. When the first reinforcing body is displaced with respect to the surrounding earth and sand, it receives a frictional resistance force from the surrounding earth and sand. First
Since the reinforcing body is connected to the earth retaining wall, the first reinforcing body tends to displace integrally with the earth retaining body when the earth retaining wall receives the earth pressure and is displaced. At this time, the frictional resistance force applied to the first reinforcing body acts so as to prevent the soil retaining wall from being displaced. In addition, in the soil in which the first reinforcing body is embedded, the second reinforcing body formed in a lattice shape by the vertical member and the horizontal member is partially overlapped with the first reinforcing body and embedded. This second reinforcing body also receives a frictional force from the surrounding earth and sand like the first reinforcing body. A plurality of locking portions provided at intervals in the extending direction of each lateral member of the connecting member are inserted into the first and second reinforcing bodies from one side of the overlapping portions of the first and second reinforcing bodies in the overlapping direction. The substantially U-shaped bottom portion of each locking portion projects toward the other side in the overlapping direction than the reinforcing body on the other side in the overlapping direction in the first and second reinforcing bodies, and
The vertical member of the reinforcing member on the one side in the stacking direction of the second reinforcing member abuts on each connecting portion of the connecting member. Since the locking member is inserted in the direction intersecting with each vertical member between the bottom of each protruding locking portion and the vertical member of the reinforcing body on the other side in the overlapping direction, the first and second reinforcing bodies are provided. The first and second reinforcement bodies are sandwiched between the connection portion of the connection member and the locking member, and are prevented from being displaced relative to the connection member in the overlapping direction relative to the connection member. Are locked to each other.
Further, the lateral member of the first reinforcing body abuts the engaging portion of the connecting member from the upstream side in the direction in which earth pressure acts, and the lateral member of the second reinforcing body acts in the engaging portion of the connecting member under earth pressure. The horizontal members of the first and second reinforcing bodies sandwich the engaging portion of the connecting member, and the displacement of the connecting member along the direction in which the earth pressure acts is prevented.

As a result, when the earth retaining wall is subjected to earth pressure and the first reinforcing body is displaced due to the earth pressure, the first and second reinforcing bodies do not separate from each other.
Can be connected. Therefore, as described above, the second
The frictional resistance force exerted on the reinforcement acts to prevent the retaining wall from displacing. In this way, by connecting the second reinforcing body to the first reinforcing body, it is possible to exert a large frictional resistance force on the soil retaining wall and reliably prevent the slope from collapsing. Such connection of the first and second reinforcing bodies is performed by inserting the respective locking portions of the connecting member into the first and second reinforcing bodies and connecting the locking portions to the vertical member of the reinforcing body on the other side in the stacking direction. It is only necessary to insert the locking member between them, and the first and second reinforcing bodies can be easily connected by a simple operation without using fastening members such as bolts and nuts. Therefore, it is possible to reduce the on-site labor and the construction time. Especially when constructing a river embankment, or when laying a road or railroad, when it is necessary to reinforce a slope over a wide area,
The construction time can be greatly reduced.

Further, since the bottom portions of the plurality of locking portions of the connecting member extend in the direction in which the earth pressure acts and are provided at intervals in the extending direction of the lateral members of the first and second reinforcing bodies, the earth pressure is applied. To increase the number of vertical members of the first and second reinforcements, the connecting member can be easily attached to the first and second reinforcements even if the space between the vertical members in the extending direction of the horizontal members becomes small. Can be inserted through.

Further, since the bottom portion of the engaging portion of the connecting member is substantially U-shaped, when the lateral members of the first and second reinforcing bodies sandwich the engaging portion of the connecting member, the connecting member is formed. Since the locking member inserted through the locking portion is sandwiched by the locking portions of the connecting member, the connecting member can be stably held.

Further, the connecting member is formed into a substantially S-shape when projected on a virtual plane parallel to the extending direction of the vertical member and the extending direction of the horizontal member. Thereby, for example, a mild steel wire rod is bent into a substantially S-shape to form a substantially S-shape material,
The connecting member can be easily manufactured only by bending the mild steel wire rod, in which the approximately S-shaped member is bent in a U shape so as to project at the central portion with respect to both ends in the width direction.

According to a second aspect of the present invention, there is provided a grid-like first reinforcing body which is connected to an earth retaining wall which receives earth pressure and is buried in the soil, and a first reinforcing body which is arranged in a direction in which the earth pressure acts. A connecting member for connecting a second reinforcing member having a lattice shape that is partially overlapped and buried in the soil, and has a bottom portion formed in a substantially U shape extending in the direction in which the earth pressure acts. It has a plurality of locking parts provided at intervals in a direction intersecting the direction in which pressure acts, and a connecting part that connects each locking part on the open end side, 2 Insert the reinforcing body,
And a method for manufacturing a connecting member for connecting the second reinforcing body, comprising: a first step of bending a mild steel wire into a substantially S-shape to form a substantially S-shape; and the substantially S-shape. A second step of bending the both ends in the width direction in a U-shape so as to project the central part, the manufacturing method of the connecting member.

According to the invention, in the first step, the mild steel wire rod is bent into a substantially S-shape to form a substantially S-shape material, and in the second step, the width direction of the substantially S-shape material is formed. It is bent in a U-shape so that the central portion thereof projects toward both end portions of. As a result, the bottom portion is formed in a substantially U-shape extending in the direction in which the earth pressure acts, and a plurality of engaging portions provided at intervals in a direction intersecting the direction in which the earth pressure acts, and each engaging portion. A connecting member having a connecting portion that connects on the open end side can be easily manufactured only by bending a mild steel wire rod.

[0019]

1 is a cross-sectional view showing a part of an earth retaining structure 10 in which a connecting structure according to an embodiment of the present invention is implemented. FIG. 2 shows the connecting member 30 and the locking member 1.
Earth retaining body 13 and anchor body 14 connected by 5
It is a perspective view which simplifies and shows. The earth retaining structure 10 is a structure for preventing the slope of the embankment from collapsing and forming a stable slope 11 when constructing a bank of a river or laying a road or a railroad, for example. Yes, the single-layer earth retaining structure 12 is laminated on a field board (not shown). Each single-layer earth retaining structure 12 includes an earth retaining body 13, an anchor body 14, a connecting member 30, a locking member 15, and a back soil 16.

The soil retaining body 13 is a soil retaining wall 17 which is arranged substantially vertically, and an anchor portion 1 which is a first reinforcing body which is connected to a lower end portion of the soil retaining wall 17 and which is bent substantially vertically and extends substantially horizontally.
8 and are configured in an L shape. The anchor body 14, which is the second reinforcing body, is provided in the anchor portion 18 of the soil retaining body 13 in a partially overlapped state and extends substantially horizontally. The connecting member 30 and the locking member 15 are provided in association with the anchor portion 18 of the soil retaining body 13 and the anchor body 14, and connect the anchor body 14 to the anchor portion 18 of the soil retaining body 13. The back soil 16 is, for example, sandy soil, and is filled and stored behind the soil retaining wall 17 of each soil retaining body 13 (on the right side in FIG. 1). In the state where the single-layer soil retaining structures 12 are stacked, the back soil 16 has a vertical relationship through the lattice-shaped anchor portion 18 and the anchor body 14. The anchor portion 18 and the anchor body 14 extend in a direction perpendicular to the soil retaining wall 17.

The anchor portion 18 and the anchor body 14 of the earth retaining body 13 which are locked to each other through the locking member 15 in the state where the single layer earth retaining structure 12 is laminated are used as the back soil 16 for embankment. The soil retaining wall 17 of the soil retaining body 13 is buried in the removed soil and locks the slope of the back soil 16. The soil retaining structure 10 configured in this manner is a soil that acts in the first direction A, which is a direction in which the slope is pushed forward by the weight of the back soil 16 (hereinafter sometimes referred to as a direction in which earth pressure acts). The pressure is received by the earth retaining wall 17 of the earth retaining body 13 and the anchor portion 1 of the earth retaining body 13 connected to the earth retaining wall 17
8 and the anchor body 14 connected to the anchor portion 18
However, by the frictional resistance force received from the back soil 16, the displacement of the soil retaining wall 17 in the front direction, that is, the first direction A is prevented against the earth pressure, and the slope of the back soil 16 is prevented from collapsing, A stable slope 11 can be formed. Here, the earth pressure includes, in addition to the weight of the back soil 16, the water pressure due to groundwater, the pressure due to the load of structures such as roads, railways, and buildings provided on the earth retaining structure 10. In this mode, the first direction A is a direction substantially perpendicular to the slope, and the anchor portion 18 and the anchor body 14 are provided along the first direction A to effectively resist earth pressure. You can

In such an earth retaining structure 10, the earth pressure acting to collapse the slope depends on the nature of the back soil 16.
It depends on the presence or absence of structures on the soil retaining structure 10 and the water level of groundwater. The frictional resistance force exerted by the anchor portion 18 and the anchor body 14 in order to prevent the displacement of the retaining wall 17 is equal to that of the anchor portion 18 and the anchor body 14.
It depends on the length embedded in the back soil 16 of the so-called anchor length L1. When the earth pressure acting on the slope is large, in order to prevent the earth retaining wall 17 from being displaced forward, the anchor portion 18 and the anchor body 14 of the earth retaining body 13 embedded in the back soil 16 resist the earth pressure. It is necessary to obtain a large frictional resistance that can be achieved, and for this purpose, it is necessary to lengthen the anchor length L1. However, the length L2 of the anchor portion 18 and the length L3 of the anchor body 14 of the soil retaining body 13 are limited in order to enable or facilitate the delivery to the site and the construction at the site.

More specifically, the stable slope 11 is obtained by using only the earth retaining body 13 without using the anchor body 14.
It is necessary and sufficient to prevent the displacement of the earth retaining wall 17 in the forward direction against the earth pressure when the earth retaining structure 10 capable of forming the earth retaining structure is to be constructed and the earth pressure acting on the slope is large. It is necessary to increase the length L2 of the anchor portion 18 in order to receive a large frictional resistance force from the back soil 16. However, the length L2 of the anchor portion 18 is limited due to the above-mentioned problems in loading and construction. In order to solve these problems at the same time, the length L2 of the anchor portion 18
Is selected to have a length that enables carrying-in and construction, and an anchor body 14 separate from the earth retaining body 13 is connected to the anchor portion 18 to increase the anchor length L1. This anchor 18
In order to facilitate the connection between the anchor body 14 and the anchor body 14, the connection structure according to the present invention using the locking member 15 is implemented to connect the anchor portion 18 and the anchor body 14.

The earth retaining body 13 is composed of a plurality of vertical members 20 which are vertical members provided at intervals, and a plurality of lateral members which intersect the vertical lines 20 and are provided at intervals. The horizontal stripes 21 are fixed by welding, for example, and are formed in a grid pattern. The vertical streak 20 is L-shaped having a horizontal portion 22 extending along the first direction A, and a rising portion 23 that is connected to an end portion of the horizontal portion 22 on the downstream side of the first direction A and rises upward. The horizontal stripes 21 extend in a second direction B that is a direction substantially perpendicular to the first direction A that is the direction in which earth pressure acts (hereinafter sometimes referred to as the direction in which the horizontal stripes extend). The vertical stripes 20 have, for example, nominal diameters of φ6, φ7.5,
Reinforcing rods of φ9 are used and 12 pieces are provided every 150 mm. As the horizontal bar 21, for example, a reinforcing bar having a nominal diameter of φ6 or φ7.5 is used, and a horizontal bar of the vertical bar 20 is 225.
31 pieces are provided on the upper side of the vertical line 20 for each mm, and two lines are provided on the upstream side of the vertical line 20 in the first direction A for each 225 mm with respect to the rising portion 23 of the vertical line 20.

The horizontal portion 22 of the vertical stripe 20 and this horizontal portion 22
The lattice-shaped anchor portion 18 is configured by the horizontal streaks 21 fixed to the horizontal portion 22 and the horizontal portion 22 and the rising portion 23.
By bending the reinforcing bars of the book, that is, the vertical bars 20, to integrally form them, the earth retaining wall 17 and the anchor portion 18 are integrally connected. The earth retaining body 13 configured in this manner has, for example, a length L of the anchor portion 18.
2 was selected as 6975 mm, and the height H1 of the retaining wall 17 was 4
The width W1 is selected to be 50 mm and the width W1 is selected to be 1000 mm.

The anchor body 14 is composed of a plurality of vertical members 25, which are vertical members provided at intervals, and a plurality of lateral members, which intersect the vertical members 25 and are provided at intervals. The horizontal bar 26 and the transverse line 26 are fixed by welding,
It is formed in a grid pattern. The vertical stripes 25 extend along the first direction A, and the horizontal stripes 26 extend substantially perpendicular to the first direction A. The vertical stripes 25 have, for example, nominal diameters of φ6, φ7.
Reinforcing bars of 5 and φ9 are used, and 12 bars are provided every 150 mm. The horizontal stripes 26 have, for example, nominal diameters of φ6, φ7.
Five reinforcing bars are used, and N pieces are provided below the vertical bars 25 at intervals of 225 mm. The number N of the horizontal streaks 26 is based on the length (L2-ΔL) that must be added to the length L2 of the anchor portion 18 of the soil retaining body 13 in order to obtain the anchor length L1 required to support the earth pressure. Can be appropriately selected. Here, ΔL is the anchor portion 18 of the soil retaining body 13.
This is a so-called lap length in the first direction A when the and the anchor body 14 are combined, and is about 300 mm, for example. For the anchor body 14 thus configured, for example, the length L3 is selected to be 1025 to 6025 mm depending on the earth pressure for the reason as described above.

FIG. 3 is a perspective view showing the connecting member 30,
4 is a plan view showing the connecting member 30, FIG. 5 is a side view showing the connecting member 30, and FIG. 6 is a cross-sectional view showing the locking portion 31A viewed from the section line S6-S6 in FIG. Yes, FIG. 7 is a cross-sectional view showing the locking portion 31B viewed from the section line S7-S7 in FIG.

A bottom portion 33 of the connecting member 30 is formed in a substantially U shape extending in the first direction A, and the anchor portion 1 of the soil retaining body 13 is formed.
8 and a plurality of locking portions 31 provided at intervals in the extending direction of the horizontal streaks 21 and 26 of the anchor body 14, and a connecting portion 32 that connects each locking portion 31 with an open end 34.

As shown in FIGS. 4 to 7, the engaging portions 31A and 31B of the connecting member 30 are such that the engaging portions 31A and 31B adjacent to each other have one of the engaging portions 31A and 31B opened. The end portion 34a is connected via the connecting portion 32. In addition, the adjacent locking portions 31B and 31C have the respective locking portions 3
The connecting portion 3 is provided at the other open end portion 34b of 1B and 31C.
It is connected via 2. In this way, when the engaging portion 31B and the adjacent engaging portion 31A of the engaging portion 31B are connected via the connecting portion 32 at one open end 34a of each engaging portion 31A, 31B. Is the locking portion 31B and the locking portion 31
The other locking portion 31C adjacent to B corresponds to each locking portion 31C.
The other open ends 34a of B and 31C are connected via a connecting portion 32. When the locking portion 31B and one adjacent locking portion 31A of the locking portion 31B are connected via the connecting portion 32 at the other open end 34a of each locking portion 31A, 31B, The stopper 31B and the other locking portion 31C adjacent to the locking portion 31B are connected via the connecting portion 32 at one open end 34a of each locking portion 31B, 31C. As shown in the plan view of FIG. 4, the connecting member 30 is formed to have a substantially S shape when projected on a virtual plane parallel to the installation surface.

As shown in FIGS. 1 to 7, the anchor body 14
Is the anchor body 1 from above the connecting portion 32 of the connecting member 30.
The vertical streaks 25 of No. 4 come into contact with each other, and the lateral streaks 26a of the anchor body 14 come into contact with each other from the downstream side of the locking portion 31 of the connecting member 30 in the first direction A. Also earth retaining body 1
The anchor portion 18 of No. 3 overlaps with the anchor body 14 from the upper side of the anchor body 14 such that the lateral streaks 21a of the anchor portion 18 contact from the upstream side of the locking portion 31 of the connecting member 30 in the first direction A. The anchor portion 31 of the connecting member 30 protruding above the anchor portion 18 of the soil retaining body 13 and the anchor portion 1
8, the locking member 15 is inserted in a direction intersecting with the vertical stripes 20, 25, that is, in the second direction B.

In this way, the soil retaining body 13 and the anchor body 1
By connecting 4 to 4, when the earth retaining wall 17 of the earth retaining body 13 is subjected to earth pressure, the earth retaining body 13 and the anchor body 1
4 tries to displace integrally. By embedding the anchor portion 18 and the anchor body 14 of the soil retaining body 13 in the back soil 16, when the soil retaining wall 17 of the soil retaining body 13 is subjected to earth pressure, the anchor portion 18 and the anchor body 14 allow the surrounding soil and sand. It is possible to receive a frictional resistance force from the frictional resistance force and to act to prevent the soil retaining wall 17 from being displaced. In this way, by connecting the anchor body 14 to the soil retaining body 13, not only the anchor portion 18 of the soil retaining body 13 but also the anchor body 14 receives a frictional resistance force from the back soil 16 to generate a large frictional resistance force. Then, this large frictional resistance force is applied to the retaining wall 17 to prevent the slope from collapsing, and to stabilize the slope 1
1 can be formed.

The anchor portion 18 and the anchor body 14 of the soil retaining body 13 are, as shown in FIGS. 1 to 7, the anchor portion 18 of the soil retaining body 13 being superposed from the upper side of the anchor body 14, but the opposite is true. In addition, the anchor body 14 may be polymerized from the upper side of the anchor portion 18 of the soil retaining body 13.

8 to 11 are plan views showing the steps of the work of connecting the soil retaining body 13 and the anchor body 14 via the connecting member 30 and the locking member 15. FIG. 8 shows the first connecting work. It is a top view showing a process, Drawing 9 is a top view showing the 2nd process of connection work, Drawing 10 is a top view showing the 3rd process of connection work, and Drawing 11 shows the 4th process of connection work. It is a top view shown. FIG. 12 is a plan view showing a fourth step of the connecting work viewed from the installation surface side. 8 to 12,
In the anchor portion 18 of the soil retaining body 13, the distance between the vertical streaks 20 is sufficiently larger than the distance between the locking portions 31 of the connecting member 30. In the anchor body 14, the vertical stripes 25 and the horizontal stripes 26 are made of synthetic resin, and the intervals between the vertical stripes 25 are slightly larger than the width of the locking portion 31 of the connecting member 30 in the second direction B.

In the first step shown in FIG. 8, the connecting member 30 is installed with the bottom end 33 of the engaging portion 31 facing upward and the open end 34 of the engaging portion 31 and the connecting portion 32 on the installation surface. And extends in the second direction B. At this time, since the connecting portions 32 of the connecting member 30 are parallel to each other and installed parallel to the installation surface, the connecting member 30 is attached to the installation surface by the open end 34 of the locking portion 31 and the connecting portion 32. It can be installed stably. Subsequently, in the second step shown in FIG. 9, the lateral streaks 21a of the anchor portion 18 of the soil retaining body 13
Is arranged on the upstream side of the connecting member 30 in the first direction A, and the vertical streak 20 of the anchor portion 18 is brought into contact with each connecting portion 32 of the connecting member 30 so that the anchor portion 18 of the soil retaining body 13 is connected to the connecting member 30. Place it above. Subsequently, in a third step shown in FIG. 10, the horizontal bar 26a of the anchor body 14 is arranged on the downstream side of the connecting member 30 in the first direction A, and the anchor body 14 is polymerized on the upper side of the anchor portion 18 of the soil retention body 13. To do.

Finally, in the fourth step shown in FIG. 11, a long locking member is provided between the bottom portion 33 of the locking portion 31 projecting above the anchor body 14 and the vertical line 25 of the anchor body 14. 15 is inserted in a direction intersecting with each vertical stripe 20, 25, that is, in the second direction B. The locking member 15 is, for example, a reinforcing bar having a diameter of 9 and one longitudinal end 15a thereof is bent. In this way, the longitudinal end 1 of the locking member 15
By bending 5a, the locking member 15 is moved in the axial direction, that is, the second direction B, during and after construction.
It is possible to prevent undesired displacement. After inserting the locking member 15, the earth retaining body 13 is pulled to the downstream side in the first direction A, and the anchor body 14 is pulled to the upstream side in the first direction A, so that the engaging portion 31 of the connecting member 30 is retained. The horizontal streaks 21a of the anchor portion 18 of the body 13 are pressed from the upstream side in the first direction A, and the horizontal streaks 26a of the anchor body 14 are pressed from the downstream side in the first direction A to be first pressed by the horizontal streaks 21a and 26a. It is clamped in the direction A.

The connection between the earth retaining body 13 and the anchor body 14, and more specifically, the connection between the anchor portion 18 of the earth retaining body 13 and the anchor body 14, is performed by connecting the engaging portion 31 of the connecting member 30 to the anchor portion 18. It suffices to insert the anchor member 14 into the anchor body 14 and insert the engaging member 15 into the engaging portion 31, and the earth retaining member 13 and the anchor body 14 can be easily connected by a simple operation and an easy operation. . Therefore, it is possible to reduce the on-site labor and the construction time. Especially when constructing a river embankment, or when laying a road or railroad, when it is necessary to reinforce a slope over a wide area,
The construction time can be greatly reduced.

The earth retaining body 13 and the anchor body 14 are connected to each other via the connecting member 30 and embedded in the soil filled as the back soil 16, and the direction in which the slope by the back soil 16 is pushed out to the earth retaining body 13, that is, When the earth pressure in the first direction A acts, the horizontal streaks 21a of the anchor portion 18 of the earth retaining body 13 are pressed against the locking portion 31 of the connecting member 30 from the upstream side in the first direction A, and the first direction A Since the horizontal bar 26a of the anchor body 14 is pressed from the downstream side of A, a force acts on the open end portions 34a, 34b of the locking portion 31 in a direction in which the open end portions 34a, 34b approach each other. The locking portion 31 of the connecting member 30 has a bottom 33 formed in a U shape extending in the first direction A, and the open ends 34a and 34b of the locking portion 31 are separated from each other. Even if a force acts on the locking portion 31 in a direction in which the open ends 34a and 34b approach each other, the portion through which the locking member 15 is inserted is the anchor portion 1.
8 does not spread in the polymerization direction of the anchor body 14,
Since the inserted locking member 15 is sandwiched by the locking portion 31 of the connecting member 30, the locking member 15 can be stably held, and thus the locking member 15 falls out and the earth retention body 13 and the anchor. It is possible to prevent the connection with the body 14 from being released. At this time, the connecting member 30
Since the bottom portion 33 of the locking portion 31 of is provided so as to extend in the first direction A, the force acting on the connecting member 30 is
Since the open ends 34a and 34b of No. 1 are only bending forces in a direction in which they approach each other, a large earth pressure can be resisted as compared with the conventional elliptical spiral coupling member.

Further, as shown in FIG. 8 to FIG. 12, two grid-like reinforcing bodies having different vertical bar intervals, such as a reinforcing bar grid and a synthetic resin anchor body, are connected to the connecting member 30 and the locking member. It can be easily connected via the member 15. Further, it is sufficient that the distance between the vertical bars is slightly larger than the width of the locking portion 31 of the connecting member 30 in the second direction B. In order to resist the earth pressure, the anchor portion 18 of the soil retaining body 13 and the vertical stripe 20 of the anchor body 14 are provided. , By increasing the number of 25, vertical stripe 2
Even if the distance between 0 and 25 becomes small, they can be easily connected via the connecting member 30.

FIG. 13 is a diagram showing a step of forming the connecting member 30. The connecting member 30 is, for example, a mild steel wire rod 4 having a nominal diameter of 4 to 5 mm as shown in FIG. 13 (1).
It consists of zero. The mild steel wire rod 40 is bent into a substantially S-shape as shown in FIG. 13B to form a substantially S-shape material 41. The both ends 42, 43 of the substantially S-shaped member 41 in the width direction are bent in a U shape so as to project the central portion 44 to form the connecting member 30 as shown in FIG. 13 (3). To do.
Thereby, the connecting member 30 can be easily formed only by bending the mild steel wire rod 40.

The above-described embodiment is an example of the present invention, and the material and dimensions can be changed as appropriate, and for example, each vertical stripe 20, 25 and each horizontal stripe 21, 21.
Deformed bar may be used as 6, and as the transverse bars 21 and 26 and the locking member 15, for example, a lightweight and highly-synthesized one such as using a rectangular tubular body whose cross-section perpendicular to the axis is a manufacturing shape is used. It may be used and the strength of the soil retaining structure 10 may be improved. Further, a plurality of anchor bodies may be connected, whereby the anchor length L1
Can be made longer.

Further, in the present embodiment, the anchor portion 18 and the anchor body 14 of the soil retaining body 13 are composed of longitudinal bars 20, 25 and lateral bars 21, 26, which are called rebar grids, which are rebar anchor parts and anchor bodies. A resin-made anchor portion and anchor body may be used. Moreover, the combination of the anchor portion 18 and the anchor body 14 of the soil retaining body 13 may be the reinforcing bar grids, the synthetic resin anchor bodies, or the reinforcing bar grid and the synthetic resin anchor body.

In the connecting member 30 of the present embodiment, the bottom portion 33 of the locking portion 31 is formed in a substantially U shape, but the bottom portion 33 is not limited to the substantially U shape, and may be, for example, a U shape. The shape may be bent at a right angle. Further, in the connecting member 30 of the present embodiment, as shown in FIGS. 4 to 7, the adjacent locking portions 31A and 31B have the connecting portion 32 at the one open end 34a of each locking portion 31A and 31B. The engaging portions 31B and 31C that are adjacent to each other are connected via the connecting portion 32 at the other open end portion 34b of the engaging portions 31B and 31C.
May be connected via the connecting portion 32 at each open end portion 34 a, 34 b of each locking portion 31. Further, the connecting portion 32 of the connecting member 30 may be a plate-shaped member.

[0043]

According to the present invention as set forth in claim 1, the first reinforcing member formed in a lattice shape by the vertical members and the horizontal members is:
For example, by locking the slope of the embankment and connecting it directly or indirectly to the retaining wall that receives the earth pressure acting on that slope,
It is buried in the soil. When the first reinforcing body is displaced with respect to the surrounding earth and sand, it receives a frictional resistance force from the surrounding earth and sand. Since the first reinforcing body is connected to the earth retaining wall, the first reinforcing body tends to be displaced integrally with the earth retaining body when the earth retaining wall receives the earth pressure and is displaced. At this time, the frictional resistance force applied to the first reinforcing body acts so as to prevent the soil retaining wall from being displaced. In addition, in the soil in which the first reinforcing body is embedded, the second reinforcing body formed in a lattice shape by the vertical member and the horizontal member is partially overlapped with the first reinforcing body and embedded. This second reinforcing body also receives a frictional force from the surrounding earth and sand like the first reinforcing body. A plurality of locking portions provided at intervals in the extending direction of each lateral member of the connecting member are inserted into the first and second reinforcing bodies from one side of the overlapping portions of the first and second reinforcing bodies in the overlapping direction. The substantially U-shaped bottom portion of each locking portion projects toward the other side in the overlapping direction than the reinforcing body on the other side in the overlapping direction in the first and second reinforcing bodies, and The vertical member of the reinforcing member on one side in the stacking direction abuts on each connecting portion of the connecting member. Since the locking member is inserted in the direction intersecting with each vertical member between the bottom of each protruding locking portion and the vertical member of the reinforcing body on the other side in the overlapping direction, the first and second reinforcing bodies are provided. The first and second parts are sandwiched by the connecting part of the connecting member and the locking member.
The first and second reinforcing bodies are locked to each other so that the reinforcing body is prevented from being displaced in the stacking direction relative to the connecting member.

Further, the lateral member of the first reinforcing member abuts the engaging portion of the connecting member from the upstream side in the direction in which the earth pressure acts, and the lateral member of the second reinforcing member acts on the engaging portion of the connecting member by the earth pressure. The lateral members of the first and second reinforcing bodies are in contact with each other from the downstream side in the acting direction and sandwich the locking portion of the connecting member, and the displacement of the connecting member along the earth pressure acting direction is prevented. .

As a result, when the earth retaining wall is subjected to earth pressure and the first reinforcing body is displaced due to the earth pressure, the first and second reinforcing bodies are prevented from separating from each other.
Can be connected. Therefore, as described above, the second
The frictional resistance force exerted on the reinforcement acts to prevent the retaining wall from displacing. In this way, by connecting the second reinforcing body to the first reinforcing body, it is possible to exert a large frictional resistance force on the soil retaining wall and reliably prevent the slope from collapsing.

Such a connection between the first and second reinforcing bodies is performed by inserting the respective locking portions of the connecting member into the first and second reinforcing bodies so that the longitudinal direction of the locking portion and the reinforcing body on the other side in the stacking direction. It is only necessary to insert the locking member between the first and second members, and the first and second reinforcing bodies can be easily connected by a simple operation without using fastening members such as bolts and nuts. Therefore, it is possible to reduce the on-site labor and the construction time. Especially when constructing a river embankment, or when laying a road or railroad, when it is necessary to reinforce a slope over a wide area,
The construction time can be greatly reduced.

Further, since the bottom portions of the plurality of engaging portions of the connecting member extend in the direction in which the earth pressure acts and are provided at intervals in the extending direction of the lateral members of the first and second reinforcing bodies, the earth pressure is applied. To increase the number of vertical members of the first and second reinforcements, the connecting member can be easily attached to the first and second reinforcements even if the space between the vertical members in the extending direction of the horizontal members becomes small. Can be inserted through. Further, since the bottom portion of the engaging portion of the connecting member is substantially U-shaped, the engaging member of the connecting member is retained when the lateral members of the first and second reinforcing bodies sandwich the engaging portion of the connecting member. Since the locking member inserted through the portion is sandwiched by the locking portions of the connecting member, the connecting member can be stably held.

Further, the connecting member is formed into a substantially S-shape when projected on a virtual plane parallel to the extending direction of the vertical member and the extending direction of the horizontal member. Thereby, for example, a mild steel wire rod is bent into a substantially S-shape to form a substantially S-shape material,
The connecting member can be easily manufactured only by bending the mild steel wire rod, in which the approximately S-shaped member is bent in a U shape so as to project at the central portion with respect to both ends in the width direction.

According to the second aspect of the present invention, in the first step, the mild steel wire rod is bent into a substantially S-shape to form a substantially S-shape material. In the second step, the substantially S-shape material is formed. The material is bent in a U shape so that the central portion of the material is protruded from both ends in the width direction. As a result, the bottom portion is formed in a substantially U-shape extending in the direction in which the earth pressure acts, and a plurality of engaging portions provided at intervals in a direction intersecting the direction in which the earth pressure acts, and each engaging portion. A connecting member having a connecting portion that connects at the open end side,
It can be easily manufactured only by bending a mild steel wire.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a part of an earth retaining structure 10 in which a connecting structure according to an embodiment of the present invention is implemented.

FIG. 2 is a perspective view showing a simplified clasp 13 and anchor body 14 coupled by a coupling member 30 and a locking member 15.

FIG. 3 is a perspective view showing a connecting member 30.

FIG. 4 is a plan view showing a connecting member 30.

5 is a side view showing a connecting member 30. FIG.

FIG. 6 is a cross-sectional view showing a locking portion 31A taken along the section line S6-S6 in FIG.

FIG. 7 is a cross-sectional view showing a locking portion 31B taken along the section line S7-S7 in FIG.

FIG. 8 is a plan view showing a first step of the connecting work.

FIG. 9 is a plan view showing a second step of the connecting work.

FIG. 10 is a plan view showing a third step of the connecting work.

FIG. 11 is a plan view showing a fourth step of the connecting work.

FIG. 12 is a plan view showing a fourth step of the connecting work viewed from the installation surface side.

FIG. 13 is a diagram showing a step of forming the connecting member 30.

FIG. 14 is a perspective view showing a connecting structure 1 of a resin net for civil engineering work disclosed in Japanese Utility Model Publication No. 6-29210.

[Explanation of symbols]

14 Anchor body 15 Locking member 18 Anchor part 20,25 vertical streaks 21,26 horizontal muscle 30 connecting members 31 Locking part 32 connection 33 bottom 34 Open end

─────────────────────────────────────────────────── ─── Continuation of the front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) E02D 17/18

Claims (2)

(57) [Claims] 1. A vertical member extending along a direction in which earth pressure acts and a horizontal member which is fixed to intersect with the vertical member in a lattice shape and are connected to a soil retaining wall which receives earth pressure to connect the soil. Is formed in a lattice shape by a first reinforcement body embedded in the structure, a vertical member extending along the direction in which the earth pressure acts, and a horizontal member that is fixed so as to intersect with the vertical member, and the earth pressure acts. A second reinforcing body that is partially overlapped with the first reinforcing body and is embedded in the soil, and a bottom portion that is formed in a substantially U shape extending in the direction in which earth pressure acts, and that extends in the extending direction of the lateral member. A connection that has a plurality of locking portions provided at intervals and a connecting portion that connects each locking portion at the open end side, and is provided by inserting each locking portion into the first and second reinforcing bodies. A member that has a shape projected on an imaginary plane parallel to the direction in which the vertical member extends and the direction in which the horizontal member extends. Connection structure of reinforcement but which comprises a connecting member formed in a substantially S-shape, and a locking member which is inserted into the engaging portion of the connecting member. 2. A lattice-shaped first reinforcing body which is connected to an earth retaining wall which receives earth pressure and is buried in the soil, and soil which is partially overlapped with the first reinforcing body in a direction in which the earth pressure acts. A connecting member for connecting to a second reinforcement body having a lattice shape embedded therein, the bottom portion of which is formed in a substantially U shape extending in a direction in which earth pressure acts, and intersects in a direction in which the earth pressure acts. A plurality of locking portions provided at intervals in the direction in which the locking portions and a connecting portion that connects the locking portions on the open end side are inserted, and the locking portions are inserted into the first and second reinforcing bodies. A method for manufacturing a connecting member for connecting the first and second reinforcing bodies, the first step of bending a mild steel wire into a substantially S-shape to form a substantially S-shape, A second step of bending the U-shaped member so as to project the central portion from both ends in the width direction of the character-shaped member; Production method.